Can`t run Ubuntu`s Kernel

Guest · Dec 20, 2015

I`m new in Ubuntu . Until now , my computer was able to run Ubuntu`s kernel correctly . Today I met with a serious error . In the first time , there was a purple screen . After restarting , a black screen with error messages (kernel panic etc.) came out . What should I do ?

skittle · Dec 20, 2015

Probably some file became corrupted after you restarted the computer uncleanly. Boot a livecd or iiveusb and run a fsck on your filesystem. If fsck does not fix the issue there is probably something more serious going on like hardware or driver error.

Guest · Dec 20, 2015

So , how can I boot a iiveusb and run a fsck ?

skittle · Dec 20, 2015

Use the same installation media that you installed ubuntu with. Open a terminal and run

Code:

sudo fsck -y /dev/sdaX

Where /dev/sdaX is the device/partition of your filesystem you want to check (you can find this with command 'sudo parted -l')
ie /dev/sda1 is my root filesystem:

Code:

$sudo parted -l

Model: ATA KINGSTON SNS4151 (scsi)
Disk /dev/sda: 16.0GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type      File system     Flags
 1      1049kB  13.9GB  13.9GB  primary   ext4            boot
 2      13.9GB  16.0GB  2084MB  extended
 5      13.9GB  16.0GB  2084MB  logical   linux-swap(v1)

Guest · Dec 20, 2015

What should I do next ?

ubuntu@ubuntu:~$ $sudo parted -l

/dev/mapper/control: open failed: Permission denied
Failure to communicate with kernel device-mapper driver.
Incompatible libdevmapper Ъ�d and kernel driver
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0
has been opened read-only.
Model: PLDS DVD+-RW DS-8A5SH (scsi)
Disk /dev/sr0: 1151MB
Sector size (logical/physical): 2048B/2048B
Partition Table: mac
Disk Flags:

Number Start End Size File system Name Flags
1 2048B 6143B 4096B Apple
2 1143MB 1145MB 2327kB EFI

skittle · Dec 20, 2015

you got permission denied because you put $ infront of sudo. $ and # just designate weather the terminal is being run as regular user ($) or root (#). sudo command makes the command following it run as root.

Code:

sudo parted -l

Guest · Dec 20, 2015

I got so many things .

Model: ATA SAMSUNG HM321HI (scsi)
Disk /dev/sda: 320GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number Start End Size Type File system Flags
1 1049kB 256MB 255MB primary ext2 boot
2 257MB 320GB 320GB extended
5 257MB 320GB 320GB logical lvm

Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/ubuntu--vg-root: 316GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags:

Number Start End Size File system Flags
1 0.00B 316GB 316GB ext4

Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/ubuntu--vg-swap_1: 4194MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags:

Number Start End Size File system Flags
1 0.00B 4194MB 4194MB linux-swap(v1)

Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0
has been opened read-only.
Model: PLDS DVD+-RW DS-8A5SH (scsi)
Disk /dev/sr0: 1151MB
Sector size (logical/physical): 2048B/2048B
Partition Table: mac
Disk Flags:

Number Start End Size File system Name Flags
1 2048B 6143B 4096B Apple
2 1143MB 1145MB 2327kB EFI

skittle · Dec 20, 2015

You have setup your disk with LVM. post output of

Code:

sudo lvdisplay

Guest · Jan 14, 2016

skittle :

I changed my HDD . After this , the problem is solved .

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